Counterbalanced pump



C. E. ANDERSON.

COUNTERBALANCED PUMP.

APPLICATION FILED NOV. 4 1.919.

Patented June 15, 1920.

TTORNEY FRANK THUNBERG, OF SACBAIVIENTO, CALIFORNIA. i

COUNTERBALANCED PUMP.

' anced Pumps; and I do declare the follow-- ing to be a full, clear, and exactdescription of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvements in pumps, and particularly to the plunger or straight lift type. j

The principal object of the invent on is to construct a pump of this type, in which a pair of pumps will be connected and arranged as a single unit in such a manner that the movement and weight of one will counterbalance the other. i I

By reason of such'construction, very little power is required to run a single pump unit, and but very little more to run a connected battery of them. v I

Another object of the invention is to so combine theworking parts of each of the pump members that the water will be drawn into the valve chamber and raised to the discharge without the aid of vacuum or air pressure. Hence the working range of the pump is not limited to any given depth, but may be used to pump water from any depth desired, the limit for any given pump being the weight of piping the framework, etc, will stand without undue strain 'or danger of collapse. 7

It is to be understood that this pump is not in any sense a-force pump, nor is it intended to take the place of such pumps,

whichhave their ownfparticular sphere of usefulness.

' It is intended for pumping a steady rather than a forceful stream of water either by hand or by electric or other power, with a minimum of power for its operation, and with a negligible cost of upkeep. It is there-- fore especially adapted for use on farms, etc to pump a supply of water from a well, or

from ditches and oanalsto irrigate the land;

Since it is not dependent on vacuum or air pressure for its operation, it does not need to be primed before starting, and hence can be positionedadjacent the ditch, etc, and left Specification of Letters Patent. Patented J Application filed November 4, 1919. Serial No. 335,691.

to run with little or no given it.

A further object of. the invention is to produce a simple and inexpensive device, and

attention being yet one which will be exceedingly effective.

for the purposes for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a i the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Figure l is an end elevation ofthe pump,

r caries.

CHARLES E. ANDERSON, 0F SACRAMENTO, CALIFORNIA, ASSIGNOR OF O N'E- I-IAL]: TO

perusal of ,7

showing one of the pump members in its lowest position, and

most.

Fig. 2 is a side elevation of the same. Referring now more particularly to the the other in its uppertherein a pair of opposed cranks 2. This characters of reference on the drawings, the numeral 1 denotes a shaft having interposed shaft is journaled at each end and between the arms on roller-bearing boxes 3 supported on any suitable frame structure such as is indicated at 4. One end of the shaft has an arm 5 depending therefrom, and adapted 1 -to be connected as by an arm 6 to any suitable source of power and so arranged that the arm 5 may have an arcuate travel of 120 degrees or thereabout. The arm 5 may also be provided with a hand hold projecting horizontally therefrom, in case it may be desired to operate the pump manually.

One member 7 of a flange coupling may be secured to the other end of the shaft, should it be desired to connect abattery of pump units together to be run from the single power plant.

Firmly fixed" on the outer ends of the crank, and extend thence These sheaves are positioned with outer ends of the cranks 2 and centrally between the arms 2 inwardly in the cranks in the direction of the I shaft 1, the centers of said sheaves being in i line with the center of said shaft. Pivotally mounted to the cranks adjacent the inner edges of the sheaves are'yokes 12, straddling the sheaves and extendingtoward the vertical plane of the shaft 1.

From the inner ends of these yokes arms or rods 13 depend for a certain distance and arethen connected to or formed with yokes 14L pivotally mounted on and straddling the upper ends of vertical pump casings 15 and 16, being mounted thereon between lugs 17,

which casings are thus, supported by and suspended from the cranks, but in opposed relation, as the cranks themselves are in opposed relation. That is, since the pump casings are adapted for vertical movement,

one of them will be up while the other is down, and viceversa.

The mechanism and operation of the pump members themselves will now be described, both of them being exactly alike in construction and functioning.

The casings 15 and 16 are suitably spaced apart in a plane parallel with the shaftl and directly under the same, being each slidable in and guided by a common member 18 positioned across the top of the well or other source of water supply. This member may be a wooden beam having metal sleeves oi bushings therein to form bearings for the casings, or it may be a one piece casting with holes bored to fit the casings, as shown on the drawings.

Downward movement of the casings 'is limited by flanges 19 thereon above the uide, so that in the event of the breakage of the rods 13 or a similar accident, the easings will not fall to the bottom of the water. Each casing above the guide is provided with a spout 20 adapted to discharge into a trough, fiexiblehoses, or similar means to carry off the water pumped up..

In the lower ends of the casings may be screwedany necessary lengths of common pipe 21, to the lower ends. of which are se cured enlarged plunger and valve chambers 22, which are to be positioned so that they will always remain submerged. The prin cipal reason for coupling ordinary pipes onto the caslngsinstead of continu ng the latter down asifar as required, is that one set V of casings of a standard length may be sup- I plunger; 2& having a similar valve 25 simi-' hemay require.

plied to a customer regardless of the depth from which he desires to pump the water, it then being only necessary for him to connecton as many lengths of ordinary pipe as This saves both weight and expense, since the casings would probably be castings, which would have to be finished on the outside for a portion of their length where they slide in'the guides, and are'of courseheavier andmore expensive to manufacture than common pipe.v In the bottom of each chamber 22 is a common form of l'ift'valve 23, adapted to rise to admit water into: said chamber.

Slidable in the same above the valve is a larly positioned therein. Each plunger is connected to a rod 26"extending up through the pipes 21 and through stuiiing boxes 27 in the top of the casings. Above this point the rods are connected to cables 28,each one.

leading to and around the corresponding sheave 10, being connected thereto at the outer edge thereof at a point substantially in line with the line of centers of the shaft and .saidsleeve, as indicated at 29.

The operation of the device is as follows:

supposing the casing 15 to be on the down-' ward stroke, and the casing 16 on the upward stroke. V

During this movement the chamber 22 in the casing 15 is moving cl'ow'nwardly into the water. This causes the valve 23 to be raised thereby, admitting water into the chamber above-the valve. the plunger "has a relative upward :movement in the chamber, on acc'ountof the fact that the cable 28 to which the plunger rod is attached, while moving down withthe crank arm and sheave, 1s at the same t me being wound onto the latter. The casing therefore,having a positive connection with the crank, has a direct drop. but the cable while being lowered also, moves relatively slower in adownward direction than the casing. This then causes the plunger to be'relatively raised in said casing. as stated.

Therefore in this position and during this stroke the plunger valve 25 will he closed,"

which causes the water contained in the pipe At the '"sameti me' above the same to be lifted and a certain amount of 'itto be discharged through thespout 20 inthe casing.

At the same time, the casing 16 is moving upwardly, which causes the valve 23 in that chamber '22 to be closed, while the plunger valve 25 will be opened, admitting water into the pipe 21 and casingthere above, since on this stroke the relative movement of the plunger 1n the casingis reversed, and the casing is moving upward faster than the plunger, causing the latter to relatively descend in the casing. This is on'account of the fact that: during. this stroke; the plunger-rod cable is unwinding from its sheave. Since both pump units are of equal weight, andboth are suspended from the opposed c anks, the weight of one, plus the "water contained therein, is counterbalanced by the weight of the other at all times, and hence the power necessary to run the pump is only what is required to overcome bearing friction plus the comparatively small amount of water had in one of-"the device, stlll in practice such deviae tions from such detail may bepresorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is l. A counterbalanced pump comprising a horizontal shaft adapted for reciprocatory.

movement through a predetermined arc, a

7 pair of opposed cranks on the shaft, a vertical pump unit flexibly suspended from each crank, and adapted for vertical movement, and means in each unit actuated from the corresponding crank whereby water may be drawn from the upper endof each pump unit with the downward movement of the same. 7

3. A counterbalanced pump comprising a horizontal shaft adapted for reciprocatory movement through a predetermined arc, a pair of opposed cranks on the shaft, a vertical pump unit flexibly suspended from each crank, and adapted for vertical movement, a submerged valve chamber at the lower end of each unit, and adapted to receive water therein with the downward movement of the unit, and means in said chamber actuated from the crank from which said unit is suspended for simultaneously discharging water from the upper end of the pump unit during its downward movement.

4. A counterbalanced pump comprising a horizontal shaft adapted for reciprocatory movement through a predetermined arc, a pair of opposedcranks on the shaft, a vertical pump unit flexibly suspended from each crank, and adapted for vertical movement,

a submerged valve chamber at the lower end of each unit, and adapted to receive water therein with the downward movement of the unit, a plunger in the chamber above the valve therein, a valve in the plunger adapted to openupwardly, and means for giving the plunger a relative upward movement in the chamber during the downward movement of the latter, the plunger-valve then being closed, whereby the water in the pump unit above the plunger will be relatively raised. r

5. A counterbalanced pump comprising a horizontal shaftadapted for reciprocatory movement through a predetermined arc, a pair of opposed cranks on the shaft, a vertical pump unit flexibly suspended from each crank,-and adapted for vertical movement, a submerged valve chamber at the lower end of each unit, and adapted to receive water therein with the downward movement of the unit, a plunger in the chamber above the v valve therein, a valve in the plunger adapted to open upwardly, and means for giving the plunger relative vertical movement in the chamber in opposed relation to the move- 1 ment of the latter. I

6. A counterbalanced pump comprising a horizontal shaft adapted for reciprocatory movement through a predetermined arc, a

pair of opposed cranks 'on the shaft, a verti cal pump unit flexibly suspended from each crank, and adapted for vertical movement, a submerged valve chamber at the lower end of each unit, and adapted to receive water therein with the downward movement of the unit, a plunger inthe chamber above the valve therein, a valve in the plunger adapted to open upwardly, and means actuated from the corresponding crank of each s unit for giving the plunger thereof a relative upward movement in the valve chamber with the downward movement of the latter, and a relative downward movement, in the chamber with'the upward movement of the unit.

7. A counterbalanced pump comprising a horizontal shaft adapted for reciprocatory 1 to open upwardly, a rod attached to the V plunger and projecting above the top of v the pump-unit casing, a sheave fixed to the corresponding crank and projecting toward the shaft, and a cable attached to the,

plunger rod and passing around the sheave on the face thereof nearest the shaft and'being secured to said sheave on the opposite face thereof, whereby with the downward movement of the'crank and pump unit suspended therefrom, the cable will wind up on the sheave and thcplunger rodraised relative to the pump unit.

In testimony whereof I affix my signature.

CHARLES ANDERSON. 

